How to solve the "Camera" is not multi-view error"?
You need to do one of this:

1) Set Stereo 3D instead of Multi-View, if you want to use one camera

2) Or if you select  Multi-View add as many cameras as you have views here:



and add a suffix to camera names from camera suffix setting. Like in my case, I have 2 views and set up 2 cameras: